Everything DNS
Master the Domain Name System from fundamentals to advanced configuration. Learn about DNS records, TTL, nameservers, propagation, DNSSEC, and troubleshooting.
Understanding DNS
Learn the fundamentals of how DNS works
What is DNS?
How the Domain Name System translates domain names into IP addresses
What are Nameservers?
Nameservers and their critical role in DNS resolution
DNS Record Types Explained
Complete guide to A, AAAA, CNAME, MX, TXT, NS, and other records
Understanding DNS TTL
Time-to-Live settings for faster changes and better performance
DNS Architecture Deep Dive
Advanced look at DNS infrastructure and caching layers
DNS Beyond the Basics
Advanced DNS concepts for power users
Anycast DNS Explained
How anycast routing improves DNS performance
Reverse DNS (PTR Records)
Reverse DNS lookups and email deliverability
Configuration
Set up and manage DNS records correctly
How to Change Nameservers
Step-by-step guide to changing nameservers safely
Point Domain to Your Website
Configure A and CNAME records to connect domain to hosting
Custom Nameservers Setup
Create branded nameservers like ns1.yourdomain.com
CAA Records for SSL Certificates
Control which CAs can issue certificates for your domain
DNS Security
Protect against DNS attacks and spoofing
Troubleshooting
Fix DNS issues and propagation problems
Domain Not Resolving
Diagnose and fix DNS resolution failures
Slow DNS Propagation
Why DNS changes take time and how to speed up
Domain Showing Old Content
Clear DNS cache and fix caching issues
WHOIS Information Not Updating
Troubleshoot delayed WHOIS updates
Domain Points to Wrong Website
Fix DNS records pointing to incorrect servers
Related Academy Tracks
Take structured courses that include DNS lessons